Steam-condensing plant and air-pump.



W. WEIR. STEAM GONDENSING PLANT AND AIR PUMP.

APPLICATION FILED FEB. 7, 1910.

Patented May 10, 1910.

INVENTOR ATTORNE rs WILLIAM WEIR, OF CATHCART, SCOTLAND.

STEAM-CONDENSING PLANT AND AIB PUMP.

Specification at Letters Patent.

Patented May 10, 1910.

Application filed February 7, 1910. Serial No. 542,499.

To all whom it may concern:

Be it known that I, lViLLuu Wain, a sub- {ect of the King of Great Britain and Ireand, and a resident of Cathcart, in the county of Renfrew, Scotland, have invented certain new and useful Improvements Relilting to SteamCondensing Plants and Air-Pum s, and of which the following is the speci cation.

This invention has for its object to provide a supply of cooling water for injection into the suction pipes of so-called dry air pumps working in conjunction with high vacua condensers for the purpose of cooling the air and condensing a portion of the vapor, and the invention relates more particularly to the arrangements for the provision of this cooling water supply in connec tion with air pumps of the special nature referred to in the specification accompanying the application for a British Patent No. 2618 of 1909.

If this cooling water supply is taken from the hot well or feed tank, it will be at the feed temperature, and at atmospheric pressure, and consequently will contain whatever proportion of air is presentin the water at that temperature and pressure. The introduction, therefore, of this supply into the.

vacuum system causes inetliciency to the extent of whatever amount of air 1s contained in the water, as this air has to be pumped.

out of the system again. The only space where practically no air is contained in the feed water is in the base of the condenser, but it is not convenient to utilize this water, as to cool it by means of an efficient cooler it would require to be pumped through the cooler, otherwise the velocity of the flow through or over the cooling tubes could only be that due to the static head which the water possessed over the cooler, and it is not convenient on board war vessels in particular to place the cooler hole: the condensers. Any arrangement or. (his character would therefore require the use of a large cooler, as the rate of transmission of heat is largely dependent on the velocity of flow, and this velocity is unobtainable without a difference in head.

In carrying out this invention according to one example, this cooling water supply is taken from the receiver space between the wet anddry compound pump referred to in the specification accompanying the application for a patent hereinbefore referred to.

In this receiver, the water will always boat a pressure considerably below that of the atmosphere, but greater than that in the condenser. and the quantity of air in the water will he in proportion to the pressure.

Preferably, there is arranged on the castingabove the head valve of the dry air pump a receiver or chamber so situated in relation to the pipe leading to the wet pump that this receiver will fill u with water before any water is discharge into-the wet pump.

From the base of the'l'eceiver a pipe car ries the water to a cooler of the tubular type chavin a su P of cold circulation water from the sea or outside source.- After passing through the cooir, the water is allowed to flew into-the dry air pump suction through a regulating valve. As this cooling injection water becomes augmented by the condensation-oi vapor in the air pump, the receiver will always remain full, but for starting purposes it may be replenished by a pipe led to it from theliot well of the wet pump.

The velocity of flow of the cooling water through the cooler will depend on the differences of pressure between the dry air pump suction and the dry air pump receiver, and if the difference of these pressures should be too slight to cause the necessary flow, the

non-return valve between the two pumps may be spring, dead-weight, or otherwise loaded to cause the necessary diflercnce in pressure.

.In order that this invention and the manner of performing the same may be properly pumps I) and E of the nature described in 100 the-specification .iercinheforc referred to. These pumps are operated by a steam cylinder, the piston rod W of which is connected directly to the plunger rod I) of the wet air pump D, whilc'thc plunger rod E 105 of the dry air pump E is connected to the piston rod \Vthrough crossheads E, E, links D" D, and a beam Y. It is, however, to be understood that the actuation may be by electric motor or other prime mover. 0

AvAmABLE Copy The wet air pump D i: ct mitrrtt-tl tn the runf tlun-0r h thtucti-u pips I" antl the dry I of thv Lll air pump.

with a-tlist-ltar tbranch 0. tintll' air From the haw of thi illillil tl' tu' rct'viwr the watrr will pass h r tlupipe Q to 3 the wait-r p:t t'. through a pipe 'l' and a salvo to the haw nr ut'tiun ut' tlw dry air I pump la.

supply of t-nhl t-ir ulating water ltftl to it through an Htltl hrant'h Z, such watt'r al'tur l)t'l'itll'lllll't 11' the t'tmlltljfl'. living lrtl away h 1 (-uhl water charged tubular injection water cooler Lflltlltt'tt'tl tn the suction and titschargr 2. In sit-am t-nutlcmiug piant having air pumps of the t-mnhinutl \\'tl :Hul tll ty e 'lltltill lllt! eh air pump lit-liar iniu fl t \"ti air pump htluw tin ll.l\l valves. :1 l'xlkl. watt-r charg'ttl tuhnlar lttjttiliil water itl' t-unturc v l tn the suction and tliathnrge ut' the th' air pump amt a rnntroilahlylt itt ttl nun-rt-turn ralrt- UH the tli chargu of tho tlry pump.

it. in .-tt-atn t ntlvnsing plant having air pum w ul' thtr t-nmhint-tl wt-t antl th'v typt \rlwrviu the lr air pump tll "lt;. s intu thtwt-t air pump below its lit'iltl talrt s. a ('tlltl watrr t-har grtl tuhular injvt-tiun water r mlur rntrnwt-al to thr sut-tinn au l tliS- l !l' "t' til the dry air pump. a trtuttrnllaLly luatlt-tl ntuprt-tprp ralw tut the tlisrhargtof the dry air pump. and a ralru rnntrullctl PiIN. t'nuut-txtiun hrtwt-vn ththut well of the wtt pump and tlutlry'air pump tli rhztrgu 1. ln .-tt atn (Ulltlt'lliltlfj plant tuning air pumps til the rutnhinr-ti wt-t autl tlr type wht-rcin 1hr tlry air pump tlih'tlltll'slt'b' into t-uult-r runnt-t'tt-tl to the sut'tiuu autl tlischargie ut' thtdry air pump and a \alvr cuttlt'ullvtl pipv (Ullllttllttll lwtwvru the hut well of the slight tn tttllfit: thtnt-t-r.--'ar circulation. the

wright. nr othsrwisv luatlutl is adjusted to lttt'l'ttlf t llt tlitl'urunre itt prvssure. 'hu\\'ll. th i ralrv is luatlcd h :rspring M. and thv tlogn-v nt' luzttling may be regulated h the Ft't'UW X.

wt-t pump antl the tll air pump discharge.

5. lmprm'vtl stontn t'tllttltttfltlg plant trumbiur'l wt-t lllttlwlly air nun; of the tvm a supply of watar to charge thttlrv air pump t-nuling systt-m, a pipe R with rain S may he tittrtl t0 load from the wet air pump 1 tlist-hargu, and when he pump is being startt'tlthts \"alvv 5 may be upcnotl 0 a l't-w HlillllitS antl thvn vlosml. thcrva'ftcr the i thargvtl tnprt-ttun-wutt-r t'nulcr punnecttid dry air pump ruuling system is self-cuntaiurtl antl cuntinuuus tt the injection water passes thruugh thtt-uulvr 1 into the (ll' V air pump 1) thrnug'h that pump antl hack into tho t-tmlor in a tUHliItllOtl-S (in-nit. .\ny t'on- (lullaitlittll of rapur rt-sulting in an (.\'("'n of 'lating through the (ll air pump system will ntwvr mix with the foul syhitlll, and thereby tm t-uoling (ll thv main ftwtl systt-m can take )liH'U.

1. In stvatu t-untlt-using plant having air pumps ut' thtrnmhinutl wet- :uul tlr type wltvrvin thtdry air pump (llfitliitti'tlfth into the wet air pump ht tluw its httlkl i'ult'CS, a

the lu-atl \'al\t-.- til the wt air pump and a \\'2lltl'-t'll;tl' "ttl injcrtiunwatt-r (Utiltl' cunurt-tutl with lllt v uctiun and discharge of lltv tll"\' air pump.

t'. ltuprun'tl slt'ttttt vutulousing plant comprising in t-umhinatiun a t'UHtlLllHl', a cumhinutl \wt and dry air pump (if the type wht-rc tladry air pump tli.-:;hargt s bcltw lllL lwzttl \ah'vs of the \\'LL air'ptuup, a water with thv Stlt'lit) antl tlisrhargtol' the dry air pump unit a ct)t\tt'0ll;lbl lOtHlCd nunrt-turn ralw on the tli-.-t-narg0 v" the dry air pump.

T. IlllplOHtl lt':tltt cuntlcnsing plantwin pri:-ing in t-tunhinatitm a CtHHlttlMi, a cumhint-tl wt-t autl tlry air pump of ti 0 type where lltt l ".i! pttlttp tlih't'llttl'gt'rs Hui V 3.110 head \alurs nl' thu wvL air pump a water chargtl ittjot-tinn-water t-oult-r t-unntt-stetl with the #lit'tiflh :tlltl tlist-hargc of tho. dry air pump, a mittrnllahly-luatlvtl nun-return ralveun the (llRllliHgt ml the dry air pt :np and a Valve cuntt'ullvtl pipe LUlllll'tiliOH llll\\'UUl1 iht:v hotwvll ut' the wet pump and the dry air pump discharge.

S. In stvam ('OlltlQHSlHg plant ha -'ing air pumps 01 the t'omhinctl wet and dry type wherein the dry air pump discharges into chamber, a cooler through which cold water the wet air pump below its head valves, a water receiving chamber on the discharge connection between the dry air pump and the wet pump, a cooler through which cold water is circulated, a pipe putting the base ofthe water receiving chamber in communication with the cooler and a valve controlled pipe connection leading from the cooler to the suction of the dry air pump.

9.In steam condensing plant having air pumps of the combined wet and dry type wherein the dry air pump discharges into the wet air pump below its head valves, :1 water receiving chamber on the discharge connection between the dry air pump and the wet pump, a controllably-loaded nonreturn valve on this discharge connection, a cold water charged tubular-injection water cooler, a pipe putting the base of the water i receiving chamber in communication with the cooler and a valve controlled pipe connection leading from the cooler to the suction of the dry air pump.

10. In steam condensing plant having air pumps of the combined wet"and dry type wherein the dry air pump discharges into the wet air pump below its head valves, a controllably loaded non-return valve and a water receiving chamber on the discharge from the dry air pump, a valve controlled pipe connection between the wet air pump discharge and the injection water receiving is circulated, and valve controlled pipes putting the cooler in connection with the base of the water receiving chamber and the base ofthe dry air pump.

11. Improved steam condensing plant comrising in combination a condenser, a comiiined wet and dry air pump of the type in which the dry air pump discharges below the head valves of the wet air pump, a con trollably loaded non-return valve and a 2 water receiving chamber on the discharge from the dry air pump, a valve controlled pipe connection between the wet air pump discharge and the injection water receiving chamber, a cooler through which cold water is circulated and valve controlled pipes )utting the cooler in connection with the tree of the water receiving chamber and the base of the dry air pump.

1:. Improved steam condensing plant comprising in combination a. condenser, a coin binccl wet and dry air pump of the type in which the drvair pump discharges below the head valves of the \vet airpump, a watcr receiving chamber on thc discharge connection between the dry air pump and the wet pump, a cooler through which cold water is circulated, a pipe putting the base of the water rweiving chamber in communication with the cooler and a valve controlled pipe connection leading from the cooler to the suction of the dry air pump.-

13. Improved steam condensing plant comprising in combination a condenser, a combined wet and dry air pump of the type in which the dry air pump dischz'irges below the head valves of the \vet. air pump, a water receiving chamber on the discharge from the dry air pump, a valve controlled pipe conncct-ion between the wet air pump discharge and the injection water receiving chamber, a cooler through which cold water is circulatcd, valve controlled pipes putting the cooler in connection with the base of the water receiving chamber and the base of the dry air pump.

In testimony whereof I have signed my name to this specification, in the presence of two subscribing witnesses.

\VILLIAM WEIR.

Witnesses:

DAVID Frnccsox, James Emerson. 

